Several countries have a silver bullion coin and most of these are silver versions of their gold coins:

Australian silver Kangaroo & Kookaburra
Austrian silver Philharmonic
British silver Britannia
Chinese silver Panda
German silver coin
Gibraltar silver Dogs
Isle of Man silver Cats
Mexican silver Libertad
New Zealand silver Kiwi
Somalian silver Monkeys
Zambian silver Elephant

There are also silver rounds which are privately minted 1 troy ounce pure silver coins with hundreds of different designs, and they can be found almost anywhere. Do an eBay search. I hope that helps.